RDS-37 was the Soviet Union's first two-stage hydrogen bomb, first tested on 22 November 1955. The weapon had a nominal yield of approximately 3 megatons. It was scaled down to 1.6 megatons for the live test.

Leading to the RDS-37

The RDS-37 was a reaction to the efforts of the United States. Previously, the Soviet Union allegedly used many of their

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